Seems to be working fine. Time will tell, but so far we are very happy with it. It certainly had a nationwide tour getting to us! It really seemed to like the Illinois area, where it went to the same town twice. We really liked how it went from Massachusetts to Connecticut before arriving in Vermont. Our only disappointment was that the filter did not get to experience Maine on its 8 day journey cross country before arriving! Travel history: Henderson, NV - Phoenix, AZ - Surprise, AZ - Jarales, NM - Milan, KS - Smithshire, IL - Countryside, IL - Willow Springs, IL -Countryside, IL - Chicago, Il - Cleveland, OH - Dewitt, NY - Springfield, MA - Willington, CT - Vermont. Got to love that FEDEX delivery.